pdeva edited a comment on issue #7486: regression: quantilesDoublesSketch returns null instead of empty array URL: https://github.com/apache/incubator-druid/issues/7486#issuecomment-484996125 My suggestion would be to return an empty array `[]` instead of `null`. With an empty array, all code that works on array continues working naturally and unmodified. Eg, methods like `.map()`, `.filter()` etc continue to work and handle the case of empty array. With `null` we have to put in special checks in code everywhere to check for null. >If null result is undesirable in Druid, it should be changed in the post-aggs. what is the right way to change null to empty array in post agg? i dont even know. could you please clarify.
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